Greg Hallahan

Managing Director

Mr. Hallahan is a member of Secretariat’s global investigations practice, which provides consulting and expert services that support clients dealing with complex challenges. Mr. Hallahan has extensive experience leading business intelligence, asset tracing and due diligence investigations globally, particularly throughout Asia. He has managed a range of investigations, often in support of litigation, including those related to fraud, conflicts of interest, collusion, theft of intellectual property, dissipation of assets and email scams.

Greg Hallahan is a corporate investigations expert with many years of experience working internationally, the last 20 years of which have been based in Asia. He is often engaged by clients and counsel to conduct in-depth investigations, using information obtained from cutting-edge open-source research tools, semi-publicly available resources, and a global network of sources providing local intelligence.

Mr. Hallahan is experienced in managing complex assets tracing engagements across Asia and around the globe more broadly, typically in support of potential or ongoing litigation efforts. He also focuses on conducting deep-dive reviews of the ownership structures, pertinent connections, backgrounds, and reputations of third parties, either as part of a due diligence process or an investigation. As a result, Mr. Hallahan has developed in-depth expertise on numerous Asian conglomerates, prominent families, and notable high-net-worth individuals. In addition, he has prepared both corporate governance and compliance strategies to help clients respond to PRC and international regulations, including those related to both data privacy and ESG issues.

Mr. Hallahan is a regular author, speaker, and interviewer on high-profile business intelligence, asset tracing, and investigations issues. He has been ranked as a ‘Band 1’ individual practitioner by Chambers & Partners every year since rankings in Asia began, with clients highlighting him as:

“One of the best investigations practitioners in the market.”

“Particularly well known in the industry as being the best for asset tracing and business intelligence.”

“Very reliable [and] willing to go the extra mile to support his clients.”

“Delivering at every stage.”

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